Machine for attaching metal collars to lamps



(No Modem 5 Sheets-Sheet 1. A. L. DAWSON.

MACHINE FOR ATTAGHING METAL GOLLARS T0 LAMPS.

Patented Apr. 14, 1885.

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' (No Model.) 5 Sheets-Sheet 2. A. L. DAWSON.

MACHINE FOR ATTACHING METAL GOLLARS T0 LAMPS. No. 315,745. Patented Apr. 14, 1885.

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5 Sheets-Sheet 3.

(No Model.)

A. L. DAWSON.

MACHINE FOB. ATTAGHING METAL GOLLARS T0 LAMPS.

Patented Apr. 14, 1885.

(No Model.) 5 Sheets-Sheet 4.

A. L. DAWSON. MACHINE FOR ATTAGHING METAL GOLLAR$ TO LAMP$. No. 315,745. Patented Apr. 14, 1885.

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5 Sheets-Sheet 5. A. L. DAWSON.

v MACHINE FOR ATTAGHING METAL GOLLARS TO LAMPs.

{No Model.)

Patented Apr. 14, 1885.

m Washmgkm u c UNr'rnn STATES f PATrnN- r @rrrcs.

ARTEMAS L. DAvVSON, OF ELK POINT, DAKOTA TERRITORY, ASSIGN'CR OF TWO-THIRDS TO CHARLES H. FREEMAN, OF SAME PLACE, AND GEORGE BOHNER, OF CHICAGO, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 815,746.

dated April 14-, 188.3.

Appiicalion tiled May 14, 1884. (N0 mode To all whom it may concern.-

Be it known that 1, Animals L. Dawson,

of Elk Point, in the county of Union and Ter-- ritory of Dakota, have invented certain new and useful Improvements inaMachine iorAttaching Collars to Lamps; and I hereby de clare the ibllowing to be a full, clear, and ex act description of the same.

My present invention is an improvement upon the device for which Letters Patent of the United States No. 289.509 were granted to me December 4, 1883. The purpose of my improved machine is identical with that described in my aforesaid patent; but themechanism by which the operative parts are actuated differs in part very materially in the two devices. Among other things, it was thought at the time of making the application upon which my aforesaid patent was granted, and until recently, that the operation of the ma chine necessitated the employment of at least two burnishers, whereas it now appears that for certain purposes with my present device but one burnisher is required.

Referring to the drawings, Figure lis a front elevation of my improved machine, having a part of a detail broken away to show its con struction; Fig. 2, a vertical section of the device shown in Fig. 1, taken on the line 2 2 of the same and viewed in the direction of the arrow-heads; Fig. 3, a transverse vertical section showing the construction of the burnisher mechanism and parts operating the same; Fig. 4, a broken portion of a detail showing the manner of its operation; Fig. 5, a detail view showing the manner of linking the burnishers together, whereby their oscillatory motion with respect to each other is effected and limited; Fig. 6, a plan view of a detail; Fig. 7, a vertical section taken on the line 7 7 of Fig. 6, viewed in the direction of the arrowheads; Fig. 8, a sectional view of a detail; Fig. 9, a perspective view of a broken portion of a detailshowing the preferred manner of its construction; Fig. 10,21scctional view of a modification, and Fig. 11 a vertical central section of the machine.

The position contemplated for my former machineis horizontal, whereas that ofmy present machine is intended, as represented in the accompanying drawings, to be vertical.

The principal improvement in the present over my former device is due to the manner of operating the part of the latter shown and described as the lever M, and which served therein, as it does now, (though withoutin its improved form moving the shaft hereinafter described,) the purpose of advancing and retracting the burnishing mechanism; but in my said former-device the proper control of its operation demanded on the part of the operator a greater delicacy, of muscular sense than should be depended upon always to exist for the purpose of producing results of invariablepcrfection. lnthcniachine as at pres- 6 5 cut constructed, and as will beseen in the following description, manipulation of a lever, K, (corresponding with the lever K in my patent referred to,) by means of which the burnisher-tips are caused to cross each other or are expanded, operates the saidleverM to advance the burnisher-tips at the proper time.

A, Figs. 2 and 11, is a hollow rotary shaft supported within bearings r a, secured upon or cast with a cylinder, A, made hollow for the sake of lightness, and forming the bed of the machine. A casting, w, is adjustably securedupon the part A, and is provided with bolt-holes in its outer end to receive screwbolts 10, by means of which casting the ma- 8o chine may be supported in a vertical position againsta post, table, or the like. Reds, tand t extend from the hearings to to a plate, L. hereinafter described, and rods i and t" extend from the bearings 12 to a cross-piece, s, the rods and cross-piece ali'ording a light but substantial frame for the support of various of the operative parts of the machine. The shaft A carries a pulley, B, and is rotated by connecting the latter with suitable drivingpower by means of a belt or by other appropriate gearing.

Burnishers, comprising each a blade, C, having one extremity formed into a finger bent to a right angle, or nearly so, to provide a burnisher-tip, r, are inserted into the shaft A from its lower end in a manner to permit theparts 1" to projectbeyond the end of the shaft. The shape of the blades 0 is somewhat tapering toward their upper extremities to permit their outer edges to lie parallel with the inside of the shaft A, as shown in Fig. 3 of the drawings, and to cause the normal positions of the burnisher-tips, when-adjusted in the manner hereinafter described, to be one upon the other, projecting in opposite directions, and coincident with each other. The blades 0 are connected toward their upper extremi-- ties between transverse parallel plates, 8, by means of screws, 8', passing through holes provided in the blades and through coincident holes in the ends of each transverse plate 8, the end of each blade being suitably packed I against the inner surface of a plate, 8, to permit the burnisher-tips r to overlap each other in the manner hereinbefore described. This arrangement permits a vertical oscillatory movement of the burnishers in opposite directions with respect to each other.

WVhen two blades 0 are employed, (the modified construction necessary to permit the use of a single blade being hereinafter described) the end of one of the blades is provided with a notched lateral projection, as shown by dotted lines at 00, Fig. 5, which embraces a pin, 8, passed through a longitudinal slot, 8 provided in one side of the shaft A and through a sleeve, F, surrounding the shaft, as will hereinafter be particularly described in another connection, and also through the center of each plate 8. The oscillation of the burnishers is thus limited by the obstruction afforded by the pin 8 against the edges of the notch formedin the blade.

Each blade 0 is provided toward one end, above the burnisher-tip r, with a lateral inward-projecting lip, to which one end of a link, q, is pivoted, the links (1 projecting laterally through recesses formed opposite each other in the end of the hollow shaft A, as clearly shown in Fig. 11 of the drawings.

' EE are upward-projecting diverging arms, pivoted each toward one extremity to the pro-' jecting end of a link, q, and fulcrumed within slots, (4, formed within lateral projections extending from a collar, W, secured upon the shaft A, toward its lower extremity, to revolve with it.

G is a chain secured at each extremity to one of the arms E, toward its upper end, and passing through slots formed in the shaft into the latter, as shown in Fig. 10, and over pulleys o, placed within the shaft A flatwise side by side, and having a common shaft comprising a pin, 0, passing through their center and through the shaft, as shown in Fig. 3 of the drawings. The chain G extends upward within the shaft to a rod, I, contained therein, to the lower extremity of which rod the chain is secured at its center. f The rod I projects beyond the upper end of the "shaft A,

, and is connected with a lever, K, hereinafter pin, Z, passing transversely through the shaft A and through a longitudinal slot, Z, formed in the pin 1, limits the vertical play of the rod I.

D is a helicalspring encircling the shaft A between the extremities of the arms E, and is confined between the sliding sleeve F and the nut H, which latter serves to adjust the tension of the spring D by being screwed forward and backward upon the threaded portion y of the shaft A. The sleeve F, represented as having a portion of its body out out for the attainment of lightness in the part,

and to economize metal, is caused to revolve with the shaft Aby means of the pin 8, which passes through it and through the longitudinal slot s in the shaft, which the sleeve partly covers, and whereby the latter shall have a limited longitudinal reciprocal movement when operated in the manner hereinafter described.

M is a lever formed of two parallel strips, h and it, (see Figs. 2 and 11,) which lie transversely to the shaft A, on opposite sides of the same, and are bolted together, as shown at z and z. A pin, it, passes transversely through both strips and abuts against a block, if, rigidly secured upon the rod 15, whereby the fulcrum of the lever is formed. Toward its center the lever M is pivoted to a sleeve, F, abutting against the sleeve F, and which, like the latter, encircles the shaft A, which revolves within it, differing in this last respect from the sleeve F, which revolves with the shaft.

A link, N, is pivotally secured toward one end of the lever K, near the upper end of the machine, and is provided toward its opposite end with a longitudinal slot, 9, through which IIO a pin, 9, passes, as also transverselythrough both strips h and h forming the lever M.

The construction of the plate L, hereinbefore referred to, is clearly shown in Figs. 6 and 7 of the drawings. It is supported by the rods 15 and t at the lower extremity of the shaft A, and is provided with a central opening coincident with that of the hollow shaft I A, to admit through'it the ends of the burnishers. The lower surface of the plate is recessed around the opening to form a seat for annular plates Z, having openings of varying sizes for collars of different sizes to be adjusted, the opening for those of the largest size being equal to the orifice in the plate L, while plates having smaller openings are provided for dependent of theirpurpose in connection with the follower mechanism hereinafter described, will, it isthought, as'sistin affording a ready comprehension of the operation of all the parts of the machine in performing its work as hereinafter described.

hen the shaft A is rotated, the centrifugal force thereby generated will cause the arms E- to diverge, drawing down the rod I until obstructed by the pin Z in the slot Z in the pin Z. The limit of expansion of the arms E is controlled by the length of the chain G, which is such that when the rod I is drawn down within the shaft A until obstructed, as above stated, the lower ends of the arms E, by their connection through the links (1 with the bur nishers, will turn the extremities of the latter outward and cause the burnisher-tips 1* to co incide with each other. The'normal position of the burnisher-tips is that shown in Fig. 1, where they coincide with each other; and this position is produced by the action of the centrifugal force generated by the rotation of the shaft A upon the arms E, causing the upper extremities of the latter to diverge, and hence their lower extremities to approach each other.

The lever K, with which the rod I is connected by means of the headed pin 1 rotating within a ring, 10 provided centrally in the pin 7;, which passes transversely through the lever K in a manner to cause the ring portion referred to to lie within the slot provided in the lever, all as hereinbefore described, and clearly shown in Fig. 8 of the drawings, to avoid obstruction to its revolving with the rotary shaft A, serves to draw out the rod I through the medium of a convenient mechanism comprising the rope 0 connected to the free end of the lever K and passing over the pulley a, supported in the cross-piece s, and by drawing out the rod Land with it the chain Gattached to it, the upper extremities of the arms E will be made to approach eachother, thereby spreading apart their lowerextremt ties, and through the blocks q pulling th burnisher-tips 1' across each other in an outward direction, and thus spreading them. When the rope a is released by the operator, centrifugal forcewill again tend to spread the arms E, thereby causing the burnisher-tips again to assume their normal position, which tendency is increased by a weight, 0, attached to the free end of the lever K.

If the bnrnisher-tips r, while the shaft A is 1 rapidly revolving, are spread apart against the centrifugal force, which tends to maintain them together, by pulling downward upon the rope 0' to raise the free end of the lever K, and thereby pull, out the rod I and bring the upper extremities of the arms E toward each other in the manner just described,without performing any work, or, in other words, without meeting with any resistance-that is to say, if no lamp and metallic collar within the same be interposed between the follower hereinafter described and plate L to receive the burnisher tips, and by their abutment against opposite sides of the inner wall of the lamp-collar limit their spreading capacity, which is otherwise controlled by the length of the chainG and theproper relative proportions of other operative features,which condition. is illustrated to enable the operation of the device to be more readily understood-they may first be spread apart to their full limit, 7

since the lever K will not afford a fulcrum at its central pivotal point untilthe resistance against the further pulling out of the rod I shall be greater than the resistance of the spring'D against a forward movement of the lever M, when the obstruction afforded to further pulling out of the red I by the abutment of the lower extremity of the slot Z in the pin Z against the pin 1 will provide a fulcrum for the lever K toward its center, thereby changing it from a lever of thesecond class to one of the first class. Further pulling upon the rope 0 will cause the link N by the abutment of the end of the slot 9 therein against the pin in the lever M to advance the latter, and with it the collars F and F, in adownward direction, whereby, owing to the slot .9 in the shaft, the pin 8 may also be advanced, causing the bur nishers, which are pivotally connected with the links g, to project farther than normally beyond the end of the shaft A, all against the resistance of the spring D, for the reason that less force is required to be exerted to over come the centrifugal force which keeps the upper extremities of the arms E spread apart and the burnisher-tips r together during the revolution of the shaft than is required to overcome the resistance of the spring D.

The mechanism by means of which a lampbody in attaching thereto a metal collar is adjusted to the plate L consists of a follower, 0, comprising a plate, preferably of cireularform, as shown, which is supported upon the bed A to the center of the disk 0, and passing thence through the annular head a? of the adjustable bearing a, in which it has a reciprocal sliding movement.

-' of the machine by a rod, f, secured at one end" P is a lever of the second class supported by Y A link, Q, is pivoted at one end to the bear- A ing, as shown at 90*, and the end of the lever P is fulcrumed to the link Q, as shown at 90 A second lever, P, is pivoted toward its center to the end of the rodf. The pivotal movemenit ofjthe link Q and pivotal connection-of the. leverP with the same permits ready vertical movement of the straight rod f, since thereby there is'no tendency to lateral strain 'upon the latter.. The lever P is secured. to.--

wardone end to the lever P by means of a bolt, 6,,screw-threaded toward both ends,

, which. bolt passes through both levers and is 1 screwed intothe last-named lever, but upon 'whichxbolt the lever P, owing to the size of the Opening-to receive the bolt, may move both vejrticallyan-d laterally. A helical spring, t, encircles the bolt 6, and is confined between the nut W, by means of which the tension of -.;of leverP toward the handle.

resistance of the spiral spring 6, which is fastened at oneend tothe lever P and at its opposite end to the detent, but is prevented from such engagement by the'end of the angular arm S, which is pivoted near its center to the lever P in the manner shown, and which projects at one end beyond the lip of the detent when-the latter engages with the rack, and abuts against the lip of the detent when the latter is disengaged from the rack, in which latter position it is held by the spiral spring e, having one end secured to the arm S, toward the opposite end of the same, the opposite end of the spring being secured to the lever P. When no resistance is encountered by' the follower 0, both levers P and P act-as one, and may readily be moved. back and forth (or, as the machine stands vertical, up and down) by means of the handle of the lever P.

The purpose of the follower mechanism, which, as hereinbefore stated, is adjustable upon the bed 'A of the machine by means of the bearing a, is firmly to press the lamp while the collar is being attached between the follower O and the plate L, in order that the metal collar shall be firmly held against the lamp-body while it is being attached, and that the latter shall not be caused to revolve by the friction of the burnisher-tips. To effect this tight grip upon the lamp-body, the follower, after first being adjusted on the part A, to admit readily the size of lamp to be operated upon, and after the lamp-body has been placed in position, is pressed against the bottom of the lamp body'by pulling upon the handle of the lever P, the effect of which operation upon the parts just described is to separate the lever P from the lever P, which is prevented from following the movement of its companion, owing to the pivotal attachment forming its fulcrum at the end of the rod f, and owing to the link d comprising a transverse strip secured to the lever P' by a pin passing througha hole in the lever and to the lever P, also by apinv whichfits into a notch formed in its side directly opposite the hole in the lever P, each pin projecting through to the opposite side of the lever throughwhichit passes, and being held together on, the-forwardside of a strip like that described as onthe rear side of thelevers, Several notches inv the-lever P opposite to holes in rectilinear relation. to each otherin the lever P are shown, of the levers. When the handlez rj against the. resistance ot the lam link 01 toward the end. opposite the handle of thelever pulls the corresponding end of the lever P, and causesthe latter to turn on its fulcrum at the end of. the rod f, and move its opposite end in the contrary direction against the resistance of the spring t" on the bolt 73. A

dog, d, is rigidly. secured upon the side of the.

lever P, which, when the latter is forced against the resistance of the spring f in the manner hereinbefore described, will act upon the bent end d ot'the angular arm S to turn it upon its pivot in opposition to the spiral spring 6, and disengage its opposite end from contact with the lip ofthe detent iflwhich is then forced between the teeth of the rack by the action of the spiral spring 6, and the lamp-body is thus automatically held firmly between the follower 0 and plate L.

When a neekless lampbody is adjusted in position, and the tubular portion of a metallic collar inserted into its orifice to be operated upon by the burnisher-tipsr to spread the inner edge of the tubular portion around the inner edge of the orifice, all as indicated by dotted lines in Fig. l of the' drawings,the burnisher-tips, which project in their normal position far enough beyond the face of the plate L to enter the metallic collar below its internallyscrew-threaded portion in order not to injure the screw-threads, cannot, by operating the lever K against the centrifugal force, be spread farther apart than the diame; ter of the orifice of the lamp-body with the intervening tubular portion ofthe collar will permit, owing to the impingement against the latter ofthe burnisher-tips,and whentheir spreading limit shall thus have been reached, the resistance of the glass surrounding the collar' upon the points of the burnisher-tips being greater than that to be overcome in the spring D, the particular function of whichwill hereinafter be explained, by continuing to pull upon the lever K the burnisher-tips 1' will be advanced into the lampbody, spreading the edge of the collar by the pressure exerted up? on them through the medium of the slotg in sufficiently far advanced into the lamp-bod y tohave cleared the work which willhave been performed, the burnisher-tips are retained in. such, position by means of an angularpawlor;

,toipermit adjustment 1) p-bod-y, the

IIO

catch, 6, pivoted, as shown, upona rod, T, (another function of which will hereinafter be described which is riveted, as shown at x, to the lever M, and advances with the latter to cause the pawl or catch Z) to engage with a stop, b, provided in a block, U. which projects laterally from the framerod i. As soon as the lever K is released centrifugal force will operate in the manner hereinbefore described to bring the burnisher-tips r together, and the weight a will assist in lowering the handle of the lever K, which, when it shall have reached its lowest point, will have pro duced contact of the projecting pin Zfiinserted into the link N near its lower end, with the tail of the pawl 12, the other end of which is retained in its engagement with the pin b in the block U by the action of the spring b (see Fig. 4,) and will thereby have released the spring D. \Vith the release of the spring D the closed burnishers will be withdrawn from the interior of the lampbody, but to prevent too sudden and forcible expansion of the spring, whereby injury might be done to the glass lamp-body, an air-cushion is provided, which consists of the hollow cylinder V, closed at one end, and supported on the frame of the device, and a piston-head, a, upon the rod T.

If no spring 1) were provided, the centrifugal force generated by the rotary shaft A would not operate satisfactorily,even with the assistance of the weight 0, if at all, to bring the burnisher tips together and withdraw them from the lamp-body against the resistance of the air-cushion. Its function, therefore, is to effect by the recoil such withdrawal, and, with the assistance of the air-cushion, to do so gradually for the purpose above stated.

Mechanism is provided to permit the blades 0 at their fulcrums to be contracted, and.

thereby avoid too great strain of the extremities of the burnisher-tips while being actuated upon the inner side of the collar and upon the lamp-body, if the burnisher-tips shall encounter a sudden unevenness in the part of the lamp upon which they are operating. Then this occurrence takes place,without the mechanism presently to be described, the efiect would be to tend suddenly to contract the burnisher-tips r to permit them to coincide with the decreased diameter of the orifice against the upward pressure of the end of the lever K, which, if great, would not permit such sudden contraction, and injury to the collar or lamp-body, or both, might be the consequence. To avoid this,each projection from the collar W is provided with a longitudinal slot, 0:, and within each recess formed in a projection is a stem, X, slotted longitudinally, as clearly shown in Figs. 3 and 10, to form a recess to receive a blade, 0, edgewise, and is provided with an opening coincident with the hole formed in the blade 0 to receive the pivot c which also passes through the slots a in the projections. A helical spring, Y, encircles each stem X, and is confined between the end of each projection and a nut, a", by which the tension of the spring may be regulated.

If the burnisher-tips in advancing into the collar and lampbody encounter a sudden unevenness, the mechanism just described will permit them to contract withoutexerting any material effect upon the chain or rod I or lever Kby pulling the arms E together at their fulcrurns.

The oscillatory movements of the burnishers afforded by the manner of their communication within the hollow shaft of course enable the burnisher-tips to adjust themselves to u'nevennesses which may occur in the under side of the top of thelamp-bod y surrounding the orifice in the same. i

The modification represented in Fig. 9 of the drawings shows the preferred way of forming the burnishers, whereby the blades G thereof and burnisher-tips r are in separate pieces joined together by screws. This construction permits ready adjustment of new burnisher-tips when the old shall have become too much worn for use without necessitating the removal of the blades, thereby rendering it possible to avoid a somewhat difficult opertion.

If it is desired to use but one burnisher instead of two, which will be the case where collars are to be attached to very small toy lamps, for which the burnishers could not be made snftlciently small to permit the use of two without weakening them too much to render them operative, or where collars are to be attached to the fillers of lamps a single burnisher may be used and inserted for the purpose in the manner clearly shown in Fig. 10 of the drawings, which represents the burnisher pivoted within the shaft by means of the pin .9 passing through the end of the blade 0. When but one burnisher is employed, the transverse plates 8 may be omitted. For very large lamps three burnishers could be used to advantage.

It is quite obvious that the operative parts contained within the hollow shaft A could be arranged outside of a solid shaft, and such construction, though inconvenient and more costly than that hereinbefore described, is intended to be included in my invention.

What I claim, and desire to secure by Letters Patent, is-

1. In a machine for attaching collars to lamp-bodies, the combination of the following elements, viz: a frame for supporting the operating mechauism,and arotary shaft carrying upon one extremity a longitudinally-remproeating and laterally-oscillating pivoted burnisher adapted to pass through the collar to r be attached and spread the tubular portion of the collar against the inner surface of the lanipbody, as set forth.

2. In a machine for attaching collars to lamp-bodies, the combination of the following elements, viz: a frame for supporting the operating mechanism, a rotary shaft mounted in IIO th e said frame, a longitudinally-reciprocati'ng and laterally-oscillating burnisher pivotally connected to the said shaft to revolve with the same, and normally and automatically maintained in a rectilinear direction with the said shaft, and projecting beyond the end of the same, and adapted to be passed through the collar to be attached and spread the tubular portion ofthe said collar against the inner surface'of thelamp-body.

.3. In a machine for attaching collars to lamp-bodies, the rotary hollow shaft A, supported in bearings, a longitudinally-reciprocating and laterally-oscillating burnisher normally and automatically maintained within the said shaft in a rectilinear direction with reference to the sides of the same, comprising a blade, 0, and burnishertip r, and pivotally supported within the said rotary shaft by means of a pin, 8 passing through a longitudinal slot in the saidshaft and through the blade 0 of the burnisher, the said burnisher-tip projecting beyond the end of the said shaft and adapted to pass throughthe collar to be attached and spread the tubular portion of the collar against the inner surface of the lamp-body, substantially as described. 4. In a machine for attaching collars to I lamp-bodies, a rotary shaft, A, a laterally-oscillating and longitudinally-reciprocating burnisher upon the said shaft, and a fulcrumed arm, E, connected toward one end with the said burnisher, and adapted to control the pressure of the said burnisher upon its work independently of the will of the operator, substantially as described, and for the purpose set forth.

5. In a machine for attaching collars to lamp-bodies, the combination, with the rotary through intermediate mechanism, to spread the tubular portion of the collar against the inner surface of the lamp body, of mechanism for advancing the said burnisher into and withdrawing it automatically from within the said lamp-body, said mechanism comprising, in combination, the following elements, viz: a lever, M, secured upon a loose sleeve, F, upon the shaft A, a sleeve, F, secured to the said shaft to revolve with the same, and connected with the said burnisher by means of a pin, 8 passing through alongitudinal slot in the said shaft and through the blade or extension 0 of the said burnisher, whereby the saidburnisher may be advanced by the action of.

the lever K upon the lever M without moving.

the shaft A longitudinally, a helical spring,

D, encircling the shaft A, and adjusted to be,

contracted with the advance of the burnisher and to expand and retract automatically the said burnisher, and means for regulating the tension of the said spring, the whole be ng constructed and arranged to operate substantially as described.

7. In a machine for attaching metal collars to lamps, the combination, with the mechan-' ism for advancing and retracting the burnisher, of a pawl or catch, 6, connected to the leverM, to move with the same, a stop, b, adjusted upon the frame of the mechanism to permit the pawl or catch b to engage with 1t when the moving end of the lever vM shall have been advanced sufficiently. far against the resistance of the spring D, and a pin, b adjusted upon the connecting-link of the 161'. vers K and M, to disengage the pawl or catchfrom the stop I) when the lever K shall have been released by the operator, whereby the; I expansion of the spring D shall be permitted at the proper time to retract the burnisher r,

and at the same time force back the lever M,

substantially as described.

8. The combination, with the frame, lever M, spring D, and pawl or catch b, in a machinefor attaching collars to lamp-bodies, of an-aircushion, operating to retard the reaction 'of: the spring D upon the driving-shaft, substan-- tially as described.

. 9. In a machine. for attaching collars; to. I

lamp-bodies, the combination of the rotary shaft A, follower O, and a plate, L, having an opening through its center, and having the material around the said opening removed,

to provide a seat for an annular plate, and an annular plate, Z, the center of the opening of which shall coincide with the center of the opening in the said plate L, as and for the purpose set forth.

10. The combination, with the plate L, of a machine for attaching metalcollars to lamps, of the follower 0, parallel to the said plate L, a lever, P, operated against the resistance of a spring to advance the said follower, whereby the lamp-body and collar shall be pressed between the said plate and follower, and operating by the recoil of the said spring to release the said lamp-body and collar, and a pawl upon the said lever engaging with a rack as soon as the desired pressure shall have been exerted against the said lamp-body to.

continue the pressure until released, substantially as and for the purpose set forth.

11. In a machine for attaching collars tov lamp-bodies, the follower 0, supported in an adjustable bearing, a, by means of a rod, f, having a longitudinal slot, f, toward one end, a link, Q, pivoted at one end to one side of the said bearing, a rack, R, secured to the op posite end of the same, a lever, P, pivoted at IIIVO one end to the link Q, a lever, P, pivoted toing and permitting engagement of the said 10 Ward its center near the end of the rod f, a 1- detent with the teeth of the said rack, the jnstable link d, connecting corresponding ends whole being constructed and arranged to opoi' the levers P and P, bolt 2 provided with erztte as and for the purpose set forth.

5 a helical sprin 5 and means for regulating T the same, and i nsei'ted Within the lever P ancl ARTEMAS DAW'SOL' through an opening in the lever P, and a dog In presence of mechanism comprising the detent i and DOUGLAS DYRENFoR-TH, means, substantially as described, for prevent- C. G. LINTHIOUM. 

